How to figure out what package something is in without resorting to Google

$ make htmlsphinx-build -b djangohtml -d _build/doctrees   . _build/htmlmake: sphinx-build: Command not foundmake: *** [html] Error 127$ sudo apt-get install sphinxE: Unable to locate package sphinx$ sudo apt-get install sphinx-buildE: Unable to locate package sphinx-build

1, Ubuntu is pretty smart. Just try to run it.

sphinx-build

The program 'sphinx-build' is currently not installed. You can install it by typing:sudo apt-get install python-sphinx

2, 

sudo aptitude search sphinx

from :  http://askubuntu.com/questions/34704/how-do-i-figure-out-what-package-something-is-in-without-resorting-to-google